Question 218065
Determine the vertical asymptotes of g(x) = (21 – 7x) / (3x – 9). 
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Factor where you can to get:
g(x) = [-7(x-3)]/[3(x-3)]
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Because x-3 is a factor common to numerator and denominator,
g has a "hole" at x = 3.
But g does not have any vertical asymptotes.
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Cheers,
Stan H.